Self-threading loom-shuttle.



No. 729,086. PATENTED MAY 26, 1903.

J. NORTHROP.

SELF THREADING LOOM SHUTTLE.

APPLIOATIO'N IILED mm; 12. 1902.

H0 MODEL.

UNrrnn STATES Patented May 26, 1903 PATENT OFFIoE.

JONAS N ORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY,OF PORTLAND, MAINE.

SELF-THREADING SPECIFLGATION forming part of Letters Patent N 0.729,086, dated May 26, 1903.

Application filed June 12,1902.'

To aZZ whom it may concern.-

Be it known that LJONAS NORTHROP, a subject of the King of GreatBritain, residing at Hopedale, in the county of Worcester and State ofMassachusetts, have invented an Improvement in Self-ThreadingLoom-Shuttles, of which the following description, in connection withthe accompanying drawings, is a specification, like characters on thedrawings representing like parts.

This invention relates to automatically-selfthreading loom-shuttles, andit has more particular reference to the threading device or block, as itis technically termed.

One of the objects of my present invention is to provide athreading-block which will pre vent the thread from accidentally jumpingor being thrown out of the thread-passage after entrance thereto andwhich will prevent a loop of thread between the filling-carrier and theinner end of the threadingblock from being thrown forward and catchin gabout the point or beak of the head which overhangs the usual horn.

Another object of my invention is to facilitate the construction of thethreading block, so that it can be made more readily and economically.

These and other novel features of my invention will be hereinafterdescribed, and particularly pointed out in the following claims.

Figure 1 is a top or plan view of one end of a loom-shuttle with athreading-block embodying one form of my invention. Fig. 2 is an innerend view of the threading-block removed. Fig. 3 shows the two parts ormembers of the block separated and in inner end elevation. Fig. 4 inside elevation illustrates the two parts, the inner side of the lowerand the outer side of the upper of said parts being viewed; and Fig. 5is a reverse or inner side elevation of the horn carrying part shown inFig. 4.

The shuttle-body A, Fig. 1, may be of any usual or well-knownconstruction, having a side delivery-eye at or near one end-such, forinstance, as in United States Patent No. 692,801, dated February 4,1902-and being 50 cut out to receive the threading device. The

Serial No. 111,832. (No model) threading-blocks are usually made ofbrass cast to the requisite general shape and then finished by sawingand filing, and it is difficult to make such castings withoutconsiderable finishing to complete the same.

To simplify the character of the mold required and to very materiallyreduce the subsequent operations necessary to complete thethreading-block, I make it in two separable parts, one of which fits theother, and both are firmly held in the recessed part of the shuttle-bodywhen assembled.

I have shown the threading device herein as comprising the parts ormembers 13 and C assembled in Figs. 1 and 2 and detached or separated inFigs. 3 and 4.

The member or part B comprises two upturned side walls 1) b the formerslightly the higher and longer and connected at their bases at 1%, theouter faces of the walls being parallel, while their inner faces arepreferably made slightly flared, forminga deep longitudinalthread-passage 1) between them. The inner ends of the walls are enlargedlaterally to form upright ears b 19 which fit into pockets 2 in theshuttle-body, Fig. 1. Near its inner end the wall I) has an uprightrecess or pocket o formed therein fora purpose to be described, and atits front end said wall is provided near its top with aforwardly-extended finger 1), shown in Fig. 1 as slightly bent or turnedoutward andhavingadependinglip I).

A stud b depends from the base 12 to enter a hole in the shuttle-body,and a transverse hole 19 through said base is adapted to receive theusual transverse retaining-bolt T. (See dotted lines, Fig. 1.) Betweenthe hole Z1 and the ears b 19 a transverse notch 12 is made intersectingthe bottom of the threadpassage to receive a piece of felt, flannel, or0 other suitable friction material F, Figs. 2, 3, and 4, to act upon theyarn as it draws through the thread-passage.

The member or part 0 comprises a thin flat depending web 0, having anextension 0 5 at its outer end to constitute the horn, and the frontedge of the web is turned laterally to form an upright stop 0 a reversewing 0 being formed on the upper part of the stop to present a recess 0Figs. 1, 3, and 5. An 10o overhanging flange c on the top of the web 0is carried forward and laterally enlarged above the horn c to form thehead a of usual shape and terminating in a point or beak 0 whichoverhangs the front end of the threadpassage when the parts areassembled, said beak being downturned at its extremity to form a prong 0The back of the head presents a transverse shoulder 0 dropped down atits extremity at 0 tofit' the shuttle-body. At its inner end the flangec is enlarged and extended outwardly, as at c, to correspond in contourto the top of the ear b and such enlargement is carried inward beyondthe inner face of the web 0 and terminates in a downturnedrearwardly-curved guard c ,convex on its upper surface, and back of theguard a depending spur c is formed, adapted to enter an upright grooveor notch b in the ear I). The web has a hole 0 for the bolt T, and it iscut away at 0 to register with the notch 19 of the member B. A pointedpin 0 is mounted in the part 0 in front of the web, and the lower end ofthe horn is shown as provided with the usual heel c to prevent thethread from lifting up after it has been directed by the horn into thedeliveryeye of the shuttle-body. When the two parts are assembled, Figs.1 and 2, the web 0 abuts against the outer face of the wall 19 the frontend of the latter entering the recess 0 and fitting against the stop 0while the enlarge ment 0 seats upon the top of the ear I), the spur 0entering and fitting snugly in the groove or notch b (see Fig. 2,) sothat the thread cannot catch at such point. The under surface of theflange c rests upon the top of the wall b and the beak 0 projectsslightly beneath or is overlapped by the finger b to compel the threadto travel beneath the finger and down under the prong 0 during itspassage to the delivery-eye, said prong thereafter preventing the threadfrom jumping out at the outer end of the thread-passage. The downturnedand rearwardly-extended guard overhangs the inner end of thethread-passage and projects into the pocket I), its convex upper surfacepresenting practically no obstacle to the ready entrance of the threadinto the thread-passage; but as the point of the guard is housed by thepocket it is impossible for the thread thereafter to throw or twist outof the passage.

By reference to the drawings it will be seen that the deep uprightpocket I) is formed in the side wall of the threading-block wholly.

below the top of the shuttle-body.

Should a loop be formed between the threading-block and the tip of thefilling-carrier, it would be'thrown forward against the guard, whichlatter would prevent the loop from being thrown far enough to catch overthe beak of the head 0 and would direct the loop down and into thethread-passage.

By making the threading-block in two separable parts the casting isgreatly simplified,

and the greater part of each part is substantially finished when it isdrawn from the mold, it being necessary only to polish those parts whichcontact with the thread when the threading device is in use, and suchportions must be polished in any event, irrespective of the particularcharacter of the block.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

1. In an antomatically-self-threading shuttie, a threading-block havingin its base a longitudinal thread-passage and also having an uprightdeep pocket at the inner end of one side wall thereof and formed whollybe low the top of the shuttle-body, a finger extended from the top ofthe wall at its outer end, a horn on the opposite side wall, the head ofthe horn overhanging such wall and extending across the outer end of thethread-- passage adjacent the tip of the finger, and a downturned,rearwardly-inolined guard behind the head crossing the inner end of thethread-passage and entering the opposite, upright pocket in the block.

2. In an antomatically-self-threa'ding shuttle, a threading-block havingin its base a longitudinal thread-passage and also having an uprightdeep pocket at the inner end of one side Wall thereof and formed Whollybelow the top of-the shuttle-body,a downturned, rearwardly-inclinedcurved guard on the opposite wall crossing the inner end of thethread-passage and entering the pocket in the block, and extensions atthe tops of and front ends of the side walls, one overlapping the otherat the outer end of the thread-passage.

3. In an automatically-self-threading shuttle, .a two-part, separablethreading-block one part having in its base a longitudinalthread-passage, a pocket in the inner face of one side wall near itsrear end, and a forwardly-extended finger at its front end, the otherpart having a horn provided with an overhanging head, a depending webback of the head, a downturned, rearwardly-extended guard, and anupright socket at the inner face of the web, the guard entering thepocket and crossing the thread-passage when the parts are assembled, andthe head extending adjacent the finger, the opposite side wall of theone part abutting against the inner face of the web, and entering theupright socket, of the other part.

4. In an automatically-self-threading shuttle, a threading-blockcomposed of two separable parts, one having a deep, longitudinalthread-passage therein and a finger extended forward beyond and at thetop of one of the side walls of the passage, said wall having an uprightpocket therein at its rear end, the other part comprising a dependingweb, a horn, and an overhanging, broadened head at its front endterminating in a beak, the web at its rear end having a depending,rearwardly-inclined guard, the beak projecting across the front end ofthe thread-passage and In testimony whereof I have signed my beneath thefinger, and the guard crossing name to this specification in thepresence of 10 the rear end of the thread-passage and entertwosubscribing witnesses.

ing the pocket in the side wall, when the two JONAS NORTHROP 5 parts areassembled in operative position, the

web of one part abutting against the side wall Witnesses: of the otherpart and having an upright socket GEORGE OTIS DRAPER, to receive thefront end of such side wall. ERNEST W. WOOD.

